重写桌面环境内存过低报错，给桌面环境登陆页面支持多主题

BuildTime.txt

@@ -1 +1 @@
-2026-03-28 21:43:07
+2026-03-28 22:22:00

GitCommit.txt

@@ -1 +1 @@
-0988f4c
+e9d4ae3

Gui/Gui.cs

@@ -23,9 +23,156 @@ namespace CMLeonOS.Gui
 {
     internal static class Gui
     {
+        private enum LowMemoryAction
+        {
+            Continue,
+            ReturnBootMenu,
+            Cancel
+        }
+
         private static bool guiRunning = false;
         private static WindowManager windowManager;
 
+        private static string FitText(string text, int width)
+        {
+            if (string.IsNullOrEmpty(text))
+            {
+                return string.Empty.PadRight(width);
+            }
+
+            if (text.Length > width)
+            {
+                if (width <= 3)
+                {
+                    return text.Substring(0, width);
+                }
+
+                return text.Substring(0, width - 3) + "...";
+            }
+
+            return text.PadRight(width);
+        }
+
+        private static void WriteAt(int x, int y, string text, ConsoleColor fg, ConsoleColor bg)
+        {
+            if (y < 0 || y >= Console.WindowHeight)
+            {
+                return;
+            }
+
+            Console.SetCursorPosition(Math.Max(0, x), y);
+            Console.ForegroundColor = fg;
+            Console.BackgroundColor = bg;
+            Console.Write(text);
+        }
+
+        private static void DrawBorderLine(int left, int y, int width, ConsoleColor fg, ConsoleColor bg)
+        {
+            string mid = new string('-', width - 2);
+            WriteAt(left, y, "+" + mid + "+", fg, bg);
+        }
+
+        private static void DrawPanelLine(int left, int y, int width, string content, ConsoleColor contentFg, ConsoleColor contentBg)
+        {
+            int innerWidth = width - 2;
+            WriteAt(left, y, "|", ConsoleColor.Cyan, ConsoleColor.Black);
+            WriteAt(left + 1, y, FitText(content, innerWidth), contentFg, contentBg);
+            WriteAt(left + width - 1, y, "|", ConsoleColor.Cyan, ConsoleColor.Black);
+        }
+
+        private static LowMemoryAction ShowLowMemoryWarning(uint ramMb)
+        {
+            int selected = 0;
+            string[] options = new[] { "Continue Anyway", "Return to Boot Menu", "Cancel" };
+            bool needsRender = true;
+
+            while (true)
+            {
+                if (needsRender)
+                {
+                    Console.BackgroundColor = ConsoleColor.Black;
+                    Console.ForegroundColor = ConsoleColor.White;
+                    Console.Clear();
+
+                    int width = Console.WindowWidth;
+                    int height = Console.WindowHeight;
+                    int panelWidth = Math.Min(86, Math.Max(58, width - 8));
+                    int contentLineCount = 7 + options.Length;
+                    int panelHeight = contentLineCount + 2;
+                    int left = Math.Max(0, (width - panelWidth) / 2);
+                    int top = Math.Max(0, (height - panelHeight) / 2);
+
+                    DrawBorderLine(left, top, panelWidth, ConsoleColor.Cyan, ConsoleColor.Black);
+                    DrawPanelLine(left, top + 1, panelWidth, " CMLeonOS Boot Warning ", ConsoleColor.Black, ConsoleColor.Cyan);
+                    DrawPanelLine(left, top + 2, panelWidth, string.Empty, ConsoleColor.White, ConsoleColor.Black);
+                    DrawPanelLine(left, top + 3, panelWidth, " Not enough system memory is available for Desktop GUI.", ConsoleColor.Yellow, ConsoleColor.Black);
+                    DrawPanelLine(left, top + 4, panelWidth, $" Detected : {ramMb} MB", ConsoleColor.Gray, ConsoleColor.Black);
+                    DrawPanelLine(left, top + 5, panelWidth, " Required : at least 1024 MB", ConsoleColor.Gray, ConsoleColor.Black);
+                    DrawPanelLine(left, top + 6, panelWidth, string.Empty, ConsoleColor.White, ConsoleColor.Black);
+                    DrawPanelLine(left, top + 7, panelWidth, " Use Up/Down to select, Enter to confirm", ConsoleColor.DarkGray, ConsoleColor.Black);
+
+                    for (int i = 0; i < options.Length; i++)
+                    {
+                        bool isSelected = i == selected;
+                        DrawPanelLine(
+                            left,
+                            top + 8 + i,
+                            panelWidth,
+                            (isSelected ? " > " : "   ") + options[i],
+                            isSelected ? ConsoleColor.Black : ConsoleColor.White,
+                            isSelected ? ConsoleColor.White : ConsoleColor.Black
+                        );
+                    }
+
+                    DrawBorderLine(left, top + panelHeight - 1, panelWidth, ConsoleColor.Cyan, ConsoleColor.Black);
+                    needsRender = false;
+                }
+
+                if (Cosmos.System.KeyboardManager.TryReadKey(out var key))
+                {
+                    if (key.Key == Cosmos.System.ConsoleKeyEx.UpArrow)
+                    {
+                        selected--;
+                        if (selected < 0)
+                        {
+                            selected = options.Length - 1;
+                        }
+                        needsRender = true;
+                    }
+                    else if (key.Key == Cosmos.System.ConsoleKeyEx.DownArrow)
+                    {
+                        selected++;
+                        if (selected >= options.Length)
+                        {
+                            selected = 0;
+                        }
+                        needsRender = true;
+                    }
+                    else if (key.Key == Cosmos.System.ConsoleKeyEx.Enter)
+                    {
+                        if (selected == 0)
+                        {
+                            return LowMemoryAction.Continue;
+                        }
+                        if (selected == 1)
+                        {
+                            return LowMemoryAction.ReturnBootMenu;
+                        }
+
+                        return LowMemoryAction.Cancel;
+                    }
+                    else if (key.Key == Cosmos.System.ConsoleKeyEx.Escape)
+                    {
+                        return LowMemoryAction.ReturnBootMenu;
+                    }
+                }
+                else
+                {
+                    System.Threading.Thread.Sleep(16);
+                }
+            }
+        }
+
         internal static bool StartGui()
         {
             Console.Clear();
@@ -35,18 +182,16 @@ namespace CMLeonOS.Gui
 
             Logger.Logger.Instance.Info("Gui", "GUI starting.");
 
-            if (Cosmos.Core.CPU.GetAmountOfRAM() < 1000)
+            uint ramMb = Cosmos.Core.CPU.GetAmountOfRAM();
+            if (ramMb < 1000)
             {
-                Console.ForegroundColor = ConsoleColor.Yellow;
-                Console.WriteLine("Not enough system memory is available to run the GUI.");
-                Console.WriteLine("At least 1 GB should be allocated.");
-                Console.ResetColor();
-                Console.Write("Continue anyway? [y/N]");
-
-                if (Console.ReadKey(true).Key != ConsoleKey.Y)
+                LowMemoryAction action = ShowLowMemoryWarning(ramMb);
+                if (action != LowMemoryAction.Continue)
                 {
                     return false;
                 }
+
+                Console.Clear();
             }
 
             Console.WriteLine("Loading apps...");

Gui/ShellComponents/Lock.cs

@@ -69,29 +69,90 @@ namespace CMLeonOS.Gui.ShellComponents
         private const int logOnButtonY = passwordY + 44;
         private const int logOnButtonHeight = 38;
 
-        private readonly Color windowBackground = Color.FromArgb(232, 238, 246);
-        private readonly Color outerBorder = Color.FromArgb(169, 181, 198);
-        private readonly Color leftPanel = Color.FromArgb(34, 53, 84);
-        private readonly Color leftPanelAccent = Color.FromArgb(74, 124, 201);
-        private readonly Color leftPanelSoft = Color.FromArgb(53, 77, 116);
-        private readonly Color rightPanel = Color.FromArgb(247, 250, 253);
-        private readonly Color titleColor = Color.FromArgb(28, 39, 56);
-        private readonly Color bodyColor = Color.FromArgb(92, 103, 119);
-        private readonly Color hintColor = Color.FromArgb(132, 142, 156);
-        private readonly Color inputBackground = Color.White;
-        private readonly Color inputForeground = Color.FromArgb(31, 42, 55);
-        private readonly Color selectionBackground = Color.FromArgb(223, 236, 255);
-        private readonly Color selectionBorder = Color.FromArgb(91, 140, 223);
-        private readonly Color primaryButton = Color.FromArgb(53, 111, 214);
-        private readonly Color primaryButtonBorder = Color.FromArgb(33, 83, 171);
-        private readonly Color primaryButtonText = Color.White;
+        private Color windowBackground;
+        private Color outerBorder;
+        private Color leftPanel;
+        private Color leftPanelAccent;
+        private Color leftPanelSoft;
+        private Color rightPanel;
+        private Color titleColor;
+        private Color bodyColor;
+        private Color hintColor;
+        private Color inputBackground;
+        private Color inputForeground;
+        private Color selectionBackground;
+        private Color selectionBorder;
+        private Color primaryButton;
+        private Color primaryButtonBorder;
+        private Color primaryButtonText;
 
         private double shakiness = 0;
 
         private List<User> users = new List<User>();
 
+        private static Color Blend(Color a, Color b, float t)
+        {
+            if (t < 0f) t = 0f;
+            if (t > 1f) t = 1f;
+            return Color.FromArgb(
+                (int)(a.R + (b.R - a.R) * t),
+                (int)(a.G + (b.G - a.G) * t),
+                (int)(a.B + (b.B - a.B) * t)
+            );
+        }
+
+        private void SyncThemeColors()
+        {
+            windowBackground = UITheme.Surface;
+            outerBorder = UITheme.SurfaceBorder;
+            rightPanel = UITheme.Surface;
+            titleColor = UITheme.TextPrimary;
+            bodyColor = UITheme.TextSecondary;
+            hintColor = UITheme.TextSecondary;
+            inputBackground = UITheme.Surface;
+            inputForeground = UITheme.TextPrimary;
+            selectionBackground = UITheme.AccentLight;
+            selectionBorder = UITheme.Accent;
+            primaryButton = UITheme.Accent;
+            primaryButtonBorder = UITheme.AccentDark;
+            primaryButtonText = UITheme.WindowTitleText;
+
+            leftPanel = Blend(UITheme.WindowTitleBackground, Color.Black, 0.28f);
+            leftPanelAccent = UITheme.Accent;
+            leftPanelSoft = Blend(leftPanel, UITheme.Accent, 0.32f);
+        }
+
+        private void ApplyThemeToControls()
+        {
+            if (userTable != null)
+            {
+                userTable.Background = inputBackground;
+                userTable.Foreground = inputForeground;
+                userTable.Border = outerBorder;
+                userTable.SelectedBackground = selectionBackground;
+                userTable.SelectedForeground = inputForeground;
+                userTable.SelectedBorder = selectionBorder;
+            }
+
+            if (passwordBox != null)
+            {
+                passwordBox.Background = inputBackground;
+                passwordBox.Foreground = inputForeground;
+                passwordBox.PlaceholderForeground = hintColor;
+            }
+
+            if (logOnButton != null)
+            {
+                logOnButton.Background = primaryButton;
+                logOnButton.Border = primaryButtonBorder;
+                logOnButton.Foreground = primaryButtonText;
+            }
+        }
+
         private void RenderBackground()
         {
+            SyncThemeColors();
+
             window.Clear(windowBackground);
             window.DrawRectangle(0, 0, width, height, outerBorder);
 
@@ -104,21 +165,21 @@ namespace CMLeonOS.Gui.ShellComponents
             window.DrawFilledRectangle(rightX, 0, rightWidth, height, rightPanel);
 
             window.DrawFilledRectangle(20, 22, 56, 56, leftPanelSoft);
-            window.DrawRectangle(20, 22, 56, 56, Color.FromArgb(109, 149, 214));
+            window.DrawRectangle(20, 22, 56, 56, Blend(leftPanelAccent, Color.White, 0.25f));
             window.DrawImageAlpha(Images.Icon_Key, 32, 34);
 
-            window.DrawString("Welcome Back", Color.White, 20, 96);
-            window.DrawString("CMLeonOS Desktop", Color.FromArgb(190, 208, 233), 20, 120);
+            window.DrawString("Welcome Back", UITheme.WindowTitleText, 20, 96);
+            window.DrawString("CMLeonOS Desktop", Blend(UITheme.WindowTitleText, leftPanel, 0.45f), 20, 120);
 
             string selectedUserName = GetSelectedUser()?.Username ?? "Guest";
-            window.DrawString("Selected account", Color.FromArgb(171, 190, 217), 20, 168);
-            window.DrawString(selectedUserName, Color.White, 20, 190);
-            window.DrawString(GetSelectedUserSubtitle(), Color.FromArgb(176, 197, 224), 20, 214);
+            window.DrawString("Selected account", Blend(UITheme.WindowTitleText, leftPanel, 0.55f), 20, 168);
+            window.DrawString(selectedUserName, UITheme.WindowTitleText, 20, 190);
+            window.DrawString(GetSelectedUserSubtitle(), Blend(UITheme.WindowTitleText, leftPanel, 0.5f), 20, 214);
 
             window.DrawFilledRectangle(20, height - 72, leftWidth - 40, 44, leftPanelSoft);
-            window.DrawRectangle(20, height - 72, leftWidth - 40, 44, Color.FromArgb(88, 118, 171));
-            window.DrawString("Tip: type password.", Color.White, 32, height - 62);
-            window.DrawString("Press Enter to sign in.", Color.FromArgb(190, 208, 233), 32, height - 44);
+            window.DrawRectangle(20, height - 72, leftWidth - 40, 44, Blend(leftPanelAccent, Color.White, 0.2f));
+            window.DrawString("Tip: type password.", UITheme.WindowTitleText, 32, height - 62);
+            window.DrawString("Press Enter to sign in.", Blend(UITheme.WindowTitleText, leftPanelSoft, 0.4f), 32, height - 44);
 
             int rightContentX = leftWidth + rightContentPadding;
             window.DrawString("Sign in", titleColor, rightContentX, 28);
@@ -127,7 +188,7 @@ namespace CMLeonOS.Gui.ShellComponents
 
             window.DrawString("Accounts", hintColor, rightContentX, accountsLabelY);
             window.DrawString("Password", hintColor, rightContentX, passwordLabelY);
-            window.DrawString("Secure local session", Color.FromArgb(118, 128, 141), rightContentX, height - rightContentBottomPadding);
+            window.DrawString("Secure local session", hintColor, rightContentX, height - rightContentBottomPadding);
 
         }
 
@@ -160,6 +221,7 @@ namespace CMLeonOS.Gui.ShellComponents
         private void RefreshLayout()
         {
             RenderBackground();
+            ApplyThemeToControls();
             wm.Update(window);
         }
 
@@ -265,6 +327,7 @@ namespace CMLeonOS.Gui.ShellComponents
             wm.AddWindow(window);
 
             RenderBackground();
+            SyncThemeColors();
 
             int contentX = leftPanelWidth + rightContentPadding;
             int contentWidth = width - contentX - rightContentPadding;
@@ -273,7 +336,7 @@ namespace CMLeonOS.Gui.ShellComponents
             userTable.CellHeight = 40;
             userTable.Background = inputBackground;
             userTable.Foreground = inputForeground;
-            userTable.Border = Color.FromArgb(203, 212, 224);
+            userTable.Border = outerBorder;
             userTable.SelectedBackground = selectionBackground;
             userTable.SelectedForeground = inputForeground;
             userTable.SelectedBorder = selectionBorder;

Kernel.cs

@@ -358,28 +358,38 @@ namespace CMLeonOS
             // 在显示 Boot Menu 之前初始化系统（VFS、用户系统等）
             InitializeSystem();
 
+            while (true)
+            {
                 BootMenuAction bootAction = BootMenu.Show();
 
                 switch (bootAction)
                 {
                     case BootMenuAction.Reboot:
                         Sys.Power.Reboot();
-                    break;
+                        return;
                     case BootMenuAction.Shutdown:
                         Sys.Power.Shutdown();
-                    break;
+                        return;
                     case BootMenuAction.GuiBoot:
                         Console.Clear();
                         Console.WriteLine("Starting GUI...");
                         Console.WriteLine();
-                    Gui.Gui.StartGui();
+                        if (Gui.Gui.StartGui())
+                        {
                             // GUI 启动后会阻塞在这里，直到 GUI 退出
                             return;
+                        }
+
+                        // 低内存提示选择“返回 BootMenu”时会回到这里继续循环
+                        continue;
                     case BootMenuAction.NormalBoot:
                     default:
                         break;
                 }
 
+                break;
+            }
+
             Console.Clear();
             // Console.WriteLine("Kernel load done!");
             // Console.WriteLine(@"----------------------------------------------------------");